JPH0613845U - Medical three-way switching valve - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the operability by reducing the rotation angle range of the rotation valve body. In the valve chamber 2, three T-shaped pipe lines (ports) 3 to 5 are opened and a rotary valve body 10 is rotatably arranged. The switching communication passage 11 formed in the rotary valve body 10 has four openings, that is, a first opening 11a to a fourth opening 11d, as openings to the side wall of the rotary valve body 10. 11a and 11b form an angle of about 45 degrees, 11b and 11c form an angle of about 90 degrees, and 11c
And 11d form an angle of approximately 45 degrees.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a medical three-way switching valve.

[0002]

[Prior art]

 In the medical field, three-way switching valves are often used to switch the connection of medical fluids and replacement fluids to patients or the connection of medical devices such as artificial hearts and artificial lungs. When the number of switching paths increases, a multiple-type three-way switching valve in which a plurality of branch conduits are connected to one common conduit and each connection part is equipped with a three-way switching valve is used. To be

In the three-way switching valve, the first port, the second port, and the third port are opened with respect to one valve chamber at intervals of approximately 90 degrees in the circumferential direction of the valve chamber. By changing the turning position of the turning valve body that is rotatably arranged in the valve chamber and has a switching communication passage, any two ports of the three ports can be connected to each other. It is intended for communication.

In the conventional three-way switching valve as described above, the switching communication passage formed in the rotary valve body is formed in a substantially T-shape as a whole in accordance with the arrangement relationship of the first to third ports. Has been. That is, three first to third openings are formed on the side wall of the rotary valve body, but these three openings are formed in a relationship offset by 90 degrees in the circumferential direction of the rotary valve body. Has been done.

[0005]

[Problems to be solved by the device]

 However, in the conventional three-way switching valve in which the switching communication passage is substantially T-shaped, it is necessary to rotate the rotary valve body by approximately 90 degrees when switching from one switching state to another switching state. There are cases where it is good, but there are cases where the rotary valve body must be rotated by approximately 180 degrees, and the range of rotation angles was extremely large. That is, two ports forming an angle of about 90 degrees, for example, a third port forming an angle of about 90 degrees from a switching state in which the first port and the second port communicate with each other. When switching to a switching state in which the second port and the second port are communicated with each other, it is necessary to rotate the rotary valve body by a large angle of about 180 degrees.

However, it is not possible to rotate the rotary valve body over a large angle range of 180 degrees with one hand, and one hand holds the three-way switching valve while the other hand rotates the rotary valve. Since the operator has to operate with both hands, such as rotating the body, the operability is extremely poor.

Therefore, an object of the present invention is to provide a medical three-way switching valve in which the turning angle range of the turning valve body is significantly reduced as compared with the conventional one, and its operability can be improved. There is something to do.

[0008]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has the following configuration. That is, the first port, the second port and the third port are opened with respect to one valve chamber at intervals of approximately 90 degrees in the circumferential direction of the valve chamber, and the valve is opened. By changing the rotation position of the rotation valve body that is rotatably arranged in the chamber and has a switching communication passage, any two ports of the three ports can be communicated with each other. In the medical three-way switching valve described above, the switching communication passage is a first opening portion, a second opening portion, and a third opening portion in the circumferential direction of the turning valve body as opening positions to the side wall of the turning valve body. Part and a fourth opening part, and the second opening part is at an angle position of about 45 degrees with respect to the first opening part in the circumferential direction of the rotary valve body, and The third opening is at an angular position of approximately 90 degrees with respect to the second opening, and the fourth opening is at an angular position of approximately 45 degrees with respect to the third opening. Is, some such as configuration.

The switching communication passage forms an angle of about 45 degrees with the first communication passage that linearly communicates the first opening portion and the fourth opening portion with each other. A second communication passage that linearly communicates the first communication passage with the second opening, forms an angle of about 45 degrees with the first communication passage, and forms an angle of about 90 degrees with the second communication passage. A third communication passage that linearly communicates the first communication passage and the third opening with an angle of degrees may be provided.

A plurality of branch pipes that intersect each other in a substantially T-shape are connected to the common pipe at intervals in the longitudinal direction of the common pipe, and the supply pipe and the branch pipes are connected to each other. It is possible to configure a three-way switching valve including the valve chamber and the turning valve body at each intersection with the road.

[0011]

[Effect of device]

 According to the present invention as set forth in claim 1, in order to change the switching state, the rotary valve body only needs to be rotated by approximately 90 degrees at the maximum. In this way, the maximum turning angle range of the turning valve body is about 90 degrees, which is half the conventional angle, so the operability is extremely good and it is possible to perform all switching with only one hand. .

With the configuration as described in claim 2, all the first to third communication passages are linearly formed, and the formation of the switching communication passage in the rotary valve body is facilitated. Moreover, it is not necessary to increase the passage resistance unnecessarily.

With the configuration as described in claim 3, it is possible to obtain the multiplex type medical three-way switching valve while obtaining the effect of claim 1.

[0014]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In FIG. 1, reference numeral 1 is a valve casing in which a valve chamber 2 having a circular cross section (diameter of about 10 mm in the embodiment) is formed. The valve casing 1 is connected to three first to third conduits 3 to 5, and each conduit 3 to 5 is opened to the valve chamber 2 at the same height position. That is, the passage in the first conduit 3 constitutes the first port 3a, the passage in the second conduit 4 constitutes the second port 4a, and the passage in the third conduit 5 constitutes It constitutes the third port 5a.

Of the three pipelines 3 to 5, the first pipeline 3 and the third pipeline 5 are positioned so as to be located on the straight line α1, and the second pipeline 4 is orthogonal to the straight line α1. It extends in the direction of the straight line α2. The above α1 and α2 respectively pass through the center 0 of the valve chamber 2, and the three conduits 3 to 5 are arranged so as to form a substantially T-shape as a whole. The valve casing 1 and the three conduits 3 to 5 are integrally formed of synthetic resin.

A rotary valve body 10 having a circular cross section is rotatably fitted in the valve chamber 2. The switching communication passage 11 formed in the rotary valve body 1 has four first to fourth openings 11a to 11d at the same height position as openings to the side wall of the rotary valve body 10. Yes In the clockwise direction in FIG. 1 of the rotary valve body 11, the second opening 11b is at an angle position of 45 degrees with respect to the first opening 11a, and the third opening 11c is with respect to the second opening 11b. The angle position is 90 degrees, and the fourth opening 11d is an angle position of 45 degrees with respect to the third opening 11c.

As described above, the first opening 11a and the fourth opening 11d are located at 180 ° symmetrical positions in the circumferential direction of the rotary valve body 10, and the two openings 11a and 11d are linear. Are communicated with each other by a first communication passage 12 extending in the direction. Further, the second opening 11b and the first communication passage 12 are communicated with each other by the second communication passage 13 which extends linearly. Furthermore, the 3rd opening part 11c and the 1st communicating path 12 are connected by the 3rd communicating path 14 extended linearly.

As described above, the switching communication passage 11 is composed of the first to third communication passages 12 to 14, and the switching communication passage 11 has each opening inside the rotary valve body 10. As long as the portions 11a to 11d communicate with each other, they can be formed in any shape. In the embodiment, the effective opening area of the first communication passage 12 is set to be larger than the effective opening areas of the second communication passage 13 and the third communication passage 14 in consideration of the air bleeding and the flow rate. ing.

In the above-described configuration, when the rotary valve body 10 is in the rotary position shown in FIG. 1, the first opening 11a is aligned with the first pipe line 3 and the fourth opening 11d is located at the second position. The third switching path 5 is brought into a first switching state in which both the switching paths 3 and 5 are communicated with each other. In the state shown in FIG. 2 in which the rotary valve body 10 is rotated 45 degrees counterclockwise from the state of FIG. 1, the second opening 11b is aligned with the first conduit 3 and the third opening 11c is located at the third position. The second switching state is established in which the two pipelines 4 are matched and the pipelines 3 and 4 are communicated with each other. In the state of FIG. 3 in which the rotary valve body 10 is rotated 45 degrees clockwise from the state of FIG. 1, the second opening 11b is aligned with the second pipe line 4, and the third opening 11c is the third pipe. A third switching state is established in which the two pipelines 4 and 5 are communicated with each other in conformity with the pipeline 5.

When switching between the second switching state shown in FIG. 2 and the third switching state shown in FIG. 3, it is necessary to rotate the rotary valve body 10 the most, but this is necessary. The turning angle of the turning valve body 10 is extremely small, such as 90 degrees.

As shown in FIG. 4, the rotary valve body 10 has its upper end portion projected above the valve casing 1. An operation lever 15 is projected from the side wall of the upper end of the rotary valve body 10. The operation lever 15 includes a horizontal lever portion 15a extending outward in the radial direction of the rotary valve body 10 and a vertical lever portion extending downwardly from the tip of the horizontal lever portion 15a by about 90 degrees. 15b. As described above, the operation lever 15 is integrally formed with the rotary valve body 10 from synthetic resin. Note that the vertical lever portion 15b can be formed by extending upward, contrary to the embodiment.

The rotary valve body 10 is rotated by externally operating the operation lever 15. At the time of this rotation, the maximum rotation angle range of the rotation valve body 10 is as small as 90 degrees as described above. Therefore, when switching between the above-mentioned three switching states, the operation is performed with only one hand. It becomes possible. That is, for example, by operating the operation lever 15 with the thumb while gripping the vicinity of the valve casing 1 with a hand other than the thumb, it is possible to switch to an arbitrary switching state.

At the time of this rotation operation, by operating the vertical lever portion 15b with the thumb, the rotation operation becomes easier as compared with the case where only the horizontal lever portion 15a exists. In order to clearly understand the switching state, four indicators 16 are provided on the upper end surface of the rotary valve body 10 in correspondence with the positions of the openings 11a to 11d, as shown in FIG. There is.

Here, in order to prevent the turning valve body 10 from rotating too much, a locking stopper 21 is formed on the upper surface of the valve casing 1 as shown in FIGS. Two engagements 22 and 23 are provided on the side wall of the valve body 10 in a protruding manner. That is, when the rotary valve body 10 is rotated to the third switching state of FIG. 3, the engaging portion 22 contacts the locking stopper 21 and the rotary valve body 10 is further rotated. Regulated. Similarly, when the turning valve body 10 is turned into the second switching state shown in FIG. 2, the engaging portion 23 comes into contact with the locking stopper 21 to prevent the turning valve body 10 from moving further. Rotation is restricted. In this way, the rotary valve body 10 can be rotated only within the minimum necessary angle range of 90 degrees.

Here, instead of or in addition to the operation lever 15, an operation lever 41 as shown by the two-dot chain line in FIGS. 4 and 6 may be provided. The operation lever 41 is composed of a horizontal lever portion 41a extending in the direction opposite to the pipe line 4, and a vertical lever portion 41b extending downward from the tip end of the horizontal lever portion 41a. It is larger than the lever-15.

FIG. 7 shows another embodiment of the present invention, which is a three-way medical three-way switching valve. That is, the first conduit 3 and the third conduit 5 in FIGS. 1 to 3 are configured as a common conduit 31 on one straight line, and the second conduit 4 in FIGS. 1 to 3 is formed into a plurality of branch pipes. As the channel 32, the common channel 31 is connected to the common channel 31 at intervals in the longitudinal direction. Then, a three-way switching valve having the valve chamber 2 and the rotary valve body 10 described in FIGS. 1 to 3 is configured at each intersection of the common pipeline 31 and the three branch pipelines 32. ing.

In order to reinforce the common conduit 31, a reinforcing rib 33 1 may be provided as shown by the alternate long and short dash line in FIG. In this case, by extending in the direction opposite to the branch conduit 32 and providing an operating lever 41 as shown in FIGS. 4 and 6, the vertical lever portion 41b is brought into contact with the reinforcing rib 33, so that rotation is possible. You may make it regulate the rotation more than predetermined of the valve body 10. That is, when the horizontal lever portion 41a is positioned on the same straight line as the branch conduit 32 (the state shown in FIG. 7), the vertical lever portion 41b is reinforced when rotated left or right by 45 degrees. It can be set so as to abut the rib 33. It should be noted that although devices and chemicals connected to the respective pipelines are illustrated in FIG. 7, the present invention is not limited to these.

Although the embodiment has been described above, in the other three-way medical three-way switching valve as shown in FIG. 7, the two-way type or the four-way type or more may be used. In addition, in the single type medical three-way switching valve shown in FIGS. 1 to 3 or the multiple type medical three-way switching valve shown in FIG. 7, the devices and chemicals connected to the pipeline are different from the conventional ones. Since the same can be done, the description thereof will be omitted.

Further, the second opening 11b and the third opening 11c (the second communication passage 13 and the third communication passage 14) may be communicated with each other without the first communication passage 12 (the first communication passage 12). With respect to the communication passage 12, another communication passage including a second communication passage 13 and a third communication passage 14 which are in communication with each other is independently formed).

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, which is shown in FIG.
X1 line equivalent sectional drawing.

FIG. 2 is a sectional view corresponding to FIG. 1, showing a switching state different from that in FIG.

FIG. 3 is a cross-sectional view corresponding to FIG. 1, showing a switching state different from FIGS. 1 and 2.

FIG. 4 is a left side view of FIG.

5 is a sectional view corresponding to line X5-X5 in FIG. 4.

FIG. 6 is a top view of FIG.

7 is a cross-sectional view of a portion corresponding to FIG. 1, showing another embodiment of the present invention.

[Explanation of symbols]

 1: valve casing 2: valve chamber 3: first conduit 3a: first port 4: second conduit 4a: second port 5: third conduit 5a: third port 10 : Rotating valve body 11: Switching communication passage 11a: First opening 11b: Second opening 11c: Third opening 11d: Fourth opening 12: First communication passage 13: Second communication passage 14: Third Communication passage 31: Common pipeline 32: Branch pipeline

Claims (3)

[Scope of utility model registration request] 1. One valve chamber has approximately 9 in the circumferential direction of the valve chamber.
The first valve, the second port, and the third port are opened at intervals of 0 degree, and the rotary valve body is rotatably arranged in the valve chamber and has a switching communication passage. In a medical three-way switching valve in which any two ports of the three ports are made to communicate with each other by changing the rotation position, the switching communication passage has the rotation valve body of the rotation valve body. As opening positions to the side wall, there are four opening portions, a first opening portion, a second opening portion, a third opening portion, and a fourth opening portion, which are arranged in this order in the circumferential direction of the rotary valve body. In the circumferential direction of the body, the second opening is at an angle position of about 45 degrees with respect to the first opening, and the third opening is at an angle position of about 90 degrees with respect to the second opening. , The fourth opening is approximately 45 with respect to the third opening.
The three-way switching valve for medical use characterized in that the angle position is in degrees. 2. The first communication passage according to claim 1, wherein the switching communication passage linearly communicates the first opening portion and the fourth opening portion, and the switching communication passage is substantially 45 degrees with respect to the first communication passage. And a second communication passage that linearly communicates the first communication passage and the second opening with each other at an angle of approximately 45 degrees with respect to the first communication passage. A third communication passage that linearly communicates the first communication passage and the third opening with an angle of approximately 90 degrees with respect to the communication passage. 3. A plurality of branch pipelines that intersect each other in a substantially T shape with respect to the common pipeline at intervals in the longitudinal direction of the one common pipeline. A three-way switching valve including the valve chamber and the rotary valve body is formed at the intersection of the supply line and each branch line, respectively. Three-way switching valve.